CN111004988A - Flange surface treatment method - Google Patents
Flange surface treatment method Download PDFInfo
- Publication number
- CN111004988A CN111004988A CN201811164287.6A CN201811164287A CN111004988A CN 111004988 A CN111004988 A CN 111004988A CN 201811164287 A CN201811164287 A CN 201811164287A CN 111004988 A CN111004988 A CN 111004988A
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- CN
- China
- Prior art keywords
- flange
- percent
- hours
- surface treatment
- dried
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
- C23C2/06—Zinc or cadmium or alloys based thereon
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
The invention relates to a flange surface treatment method. The method comprises the following steps: the method comprises the following steps: placing the flange in a rust removing solution to be soaked for 1.5-2 hours; step two: placing the derusted flange in clear water to clean and dry; step three: soaking the cleaned and dried flange in the plating assistant solution for 2.5-3 hours, and then drying; step four: hot-dipping the dried flange in molten zinc for 4-5 hours; step five: cooling the hot-dip galvanized flange to room temperature, and then cleaning and drying the flange; step six: and polishing and finish machining the cleaned and dried flange to meet the size requirement. The process method is simple, and the corrosion resistance of the flange can be greatly improved by adopting the process method, so that the service life of the flange is greatly prolonged.
Description
Technical Field
The invention relates to a flange surface treatment method.
Background
A Flange (Flange), also known as a Flange collar or Flange. The flange is a part for connecting the shafts and is used for connecting pipe ends; there are also flanges on the inlet and outlet of the equipment for the connection between two pieces of equipment, such as reducer flanges. The flange connection or flange joint is a detachable connection which is formed by connecting a flange, a gasket and a bolt with each other to form a group of combined sealing structures. The pipeline flange is a flange for piping in a pipeline device, and is used on equipment to be an inlet and outlet flange of the equipment. The flanges are provided with holes, and the two flanges are tightly connected through bolts. The flanges are sealed with gaskets. The flange is divided into a threaded connection (screw thread connection) flange, a welding flange and a clamping flange. The flanges are used in pairs, the low-pressure pipeline can be screwed with the flanges, and the flanges are welded under the pressure of more than four kilograms. And a sealing gasket is arranged between the two flanges and then is fastened by bolts. The flanges of different pressures have different thicknesses and they use different bolts. When the water pump and the valve are connected with a pipeline, the parts of the equipment and equipment are also made into corresponding flange shapes, which are also called flange connection. The connecting parts which are connected by using bolts at the peripheries of two planes and are closed at the same time are generally called flanges, and for example, the connecting parts of the ventilating duct can be called flange parts. However, the connection is only a part of equipment, such as the connection between a flange and a water pump, and the water pump is not easy to be called as a flange part. The small-sized valve can be called as a flange part. Due to the fact that the flange has high requirements on special working environment and corrosion resistance, the flange in the prior art is poor in corrosion resistance and short in service life.
Disclosure of Invention
Aiming at the defects, the invention aims to provide a flange surface treatment method which is simple in process method, can greatly improve the corrosion resistance of a flange and prolongs the service life of the flange.
Therefore, the technical scheme adopted by the invention is as follows:
the method comprises the following steps:
the method comprises the following steps: placing the flange in a rust removing solution to be soaked for 1.5-2 hours;
step two: placing the derusted flange in clear water to clean and dry;
step three: soaking the cleaned and dried flange in the plating assistant solution for 2.5-3 hours, and then drying;
step four: hot-dipping the dried flange in molten zinc for 4-5 hours;
step five: cooling the hot-dip galvanized flange to room temperature, and then cleaning and drying the flange;
step six: and polishing and finish machining the cleaned and dried flange to meet the size requirement.
As a further improvement of the technical scheme, the plating assistant solution comprises zinc ammonium chloride.
As a further improvement of the technical scheme, the main components of the rust removing liquid comprise oxalic acid, sodium dodecyl sulfate, phosphoric acid, hydrochloric acid, fatty alcohol-polyoxyethylene ether, hexamethylenetetramine and water.
As a further improvement of the technical scheme, the rust removing liquid comprises the following components in percentage by weight: 0.5 to 0.6 percent of oxalic acid, 0.4 to 0.5 percent of sodium dodecyl sulfate, 2.2 to 2.5 percent of phosphoric acid, 50 to 55 percent of hydrochloric acid, 0.6 to 0.8 percent of fatty alcohol-polyoxyethylene ether, 0.4 to 0.6 percent of hexamethylenetetramine and 40 to 45 percent of water.
The invention has the advantages that:
the process method is simple, and the corrosion resistance of the flange can be greatly improved by adopting the process method, so that the service life of the flange is greatly prolonged.
Detailed Description
Example 1
A flange surface treatment method comprises the following steps:
the method comprises the following steps: placing the flange in a rust removing solution to be soaked for 1.5 hours;
step two: placing the derusted flange in clear water to clean and dry;
step three: soaking the cleaned and dried flange in the plating assistant solution for 2.5 hours, and then drying;
step four: hot-dipping the dried flange in molten zinc for 4 hours;
step five: cooling the hot-dip galvanized flange to room temperature, and then cleaning and drying the flange;
step six: and polishing and finish machining the cleaned and dried flange to meet the size requirement.
As a further improvement of the technical scheme, the plating assistant solution comprises zinc ammonium chloride.
As a further improvement of the technical scheme, the main components of the rust removing liquid comprise oxalic acid, sodium dodecyl sulfate, phosphoric acid, hydrochloric acid, fatty alcohol-polyoxyethylene ether, hexamethylenetetramine and water.
As a further improvement of the technical scheme, the rust removing liquid comprises the following components in percentage by weight: 0.5 percent of oxalic acid, 0.4 percent of sodium dodecyl sulfate, 2.2 percent of phosphoric acid, 50 percent of hydrochloric acid, 0.6 percent of fatty alcohol-polyoxyethylene ether, 0.4 percent of hexamethylenetetramine and 40 percent of water.
Example 2
A flange surface treatment method comprises the following steps:
the method comprises the following steps: placing the flange in a derusting solution to be soaked for 2 hours;
step two: placing the derusted flange in clear water to clean and dry;
step three: soaking the cleaned and dried flange in the plating assistant solution for 3 hours, and then drying;
step four: hot dipping the dried flange in molten zinc for 5 hours;
step five: cooling the hot-dip galvanized flange to room temperature, and then cleaning and drying the flange;
step six: and polishing and finish machining the cleaned and dried flange to meet the size requirement.
As a further improvement of the technical scheme, the plating assistant solution comprises zinc ammonium chloride.
As a further improvement of the technical scheme, the main components of the rust removing liquid comprise oxalic acid, sodium dodecyl sulfate, phosphoric acid, hydrochloric acid, fatty alcohol-polyoxyethylene ether, hexamethylenetetramine and water.
As a further improvement of the technical scheme, the rust removing liquid comprises the following components in percentage by weight: 0.6% of oxalic acid, 0.5% of sodium dodecyl sulfate, 2.5% of phosphoric acid, 55% of hydrochloric acid, 0.8% of fatty alcohol-polyoxyethylene ether, 0.6% of hexamethylenetetramine and 45% of water.
Claims (4)
1. A flange surface treatment method is characterized by comprising the following steps:
the method comprises the following steps: placing the flange in a rust removing solution to be soaked for 1.5-2 hours;
step two: placing the derusted flange in clear water to clean and dry;
step three: soaking the cleaned and dried flange in the plating assistant solution for 2.5-3 hours, and then drying;
step four: hot-dipping the dried flange in molten zinc for 4-5 hours;
step five: cooling the hot-dip galvanized flange to room temperature, and then cleaning and drying the flange;
step six: and polishing and finish machining the cleaned and dried flange to meet the size requirement.
2. A flange surface treatment method according to claim 1, wherein the component of the plating assistant solution is zinc ammonium chloride.
3. A flange surface treatment method according to claim 1, wherein the rust removing liquid mainly comprises oxalic acid, sodium dodecyl sulfate, phosphoric acid, hydrochloric acid, fatty alcohol-polyoxyethylene ether, hexamethylenetetramine and water.
4. A flange surface treatment method according to claim 3, wherein the rust removing liquid comprises the following components in percentage by weight: 0.5 to 0.6 percent of oxalic acid, 0.4 to 0.5 percent of sodium dodecyl sulfate, 2.2 to 2.5 percent of phosphoric acid, 50 to 55 percent of hydrochloric acid, 0.6 to 0.8 percent of fatty alcohol-polyoxyethylene ether, 0.4 to 0.6 percent of hexamethylenetetramine and 40 to 45 percent of water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811164287.6A CN111004988A (en) | 2018-10-05 | 2018-10-05 | Flange surface treatment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811164287.6A CN111004988A (en) | 2018-10-05 | 2018-10-05 | Flange surface treatment method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111004988A true CN111004988A (en) | 2020-04-14 |
Family
ID=70110492
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811164287.6A Pending CN111004988A (en) | 2018-10-05 | 2018-10-05 | Flange surface treatment method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111004988A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115992336A (en) * | 2023-03-22 | 2023-04-21 | 张家港广大特材股份有限公司 | Surface treatment method of large-caliber flange for wind power |
-
2018
- 2018-10-05 CN CN201811164287.6A patent/CN111004988A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115992336A (en) * | 2023-03-22 | 2023-04-21 | 张家港广大特材股份有限公司 | Surface treatment method of large-caliber flange for wind power |
| CN115992336B (en) * | 2023-03-22 | 2023-06-09 | 张家港广大特材股份有限公司 | Surface treatment method of large-caliber flange for wind power |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20200414 |